Mold box



March 26, 1929. J. H. BESSER MOLD Box Filed Aug. 5, 1926 v2 sheets-sheet 1 |Nvl-:NT0R fassa/Y. Besser BY M@ ATTORNEY Fig. j

March' 26, 1929. J. H. BESSER Filed Aug. 5, 1926 2 Sheets-Sheet 2 lNvlzNToRv BY N ATTORNEY Patented Mar.y 26," 1929. l

UNITED STATES PATENT OFFICE.

JESSE'H. BESSER, OF ALPEN'A, MICHIGAN, aASVSIGNOB. T0 BESSER MANUFACTURIN y COMPANY, OF ALPENA, MICHIGAN, A CORPORATION OF MICHIGAN.

HOLD BOX.

Application illed August 5, 1926. Serial No. 127,272.

My invention relates to mold boxes for molding blocks or other cement or concrete or clay products, especially -those of hollow form, and usually of rectangular or other quadrilateral shape in general, and further,

my invention is especially adapted to molding operations in which it is desired to remove -the molds away from the finished blocks, and in doing so, removev the cores from the blocks at the saine time, and providing means for holding the block down While the mold and cores are removed. y Itisaspecial object of my invention that the mold box and cores may be Aremoved from hollow blocks Without injury to the latter by such removal. To this end, it is my purpose to provide spaced cores which are suspended from means supported by the upper edgesk of the mold.

It is a further object. of my invention `to provid-e hollow cores having open lower` ends and closed upper ends, and supports secured to the closed ends of the cores, so that lifting the supports will raise the several cores.

It is also a further object to provide cross supports each of Whichfis secured to a core, the supports extending over the' edges of the walls of the mold box and their upper edges projecting above the mold, so that lift- 3) ing the mold box Will raise the said cross supports, and thereby the cores sus ended v therefrom as well as'the upper e ges of,

these supports being available for certain guiding functions later to be explained. It is further anl object to make the exterior con. tour of the cores tapering inward fromthe upper end or the end ofi-attachment to'the supports, downward `toward the pallet, so

that the cores carried by said supports mayl lo the more readily be removed from the body of th-e block and pallet.

A further object of my invention is to provide a means having the cross contour of the block for-.resting upon the latter while the mold and cores carried thereby, are removed. It is an objectk of my invention to provide a mold box carrying Within the same, cores removable from the block, the walls of the mold box being shallower than the cores themselves, and the relative position of the parts being such that when the coresrest on the pallet, the walls will be held up above the pallet.

A still further object is the provision of a springfpresse'd' plug carried within the body rying therefrom a core to be used. in the mold box, and astripping element comprising spaced stripper members whose spaces therel'ietween are guided by their position relative to the upper edges of said supports whfch, project above the upper edges of the mo With these and other valuable objects in View, as later to be explained, my invention conslsts ofi they construction and functions explained in the following description, recited in the appended claims and illustrated 1n the accompanying drawings, in which:-

Figure 1 is a plan view of the mold box with the cores therein, and the spaces therebetween filled with the block materia-l;

Figure 2 is a transverse, vertical section of the same taken on the broken line' 2 2 of Fig. 1;` .p1

Figure 3 is a transverse, vertical section taken in the plane indicated4 by the line 3--3 of Fig. 2; Figurel 4 is a plan view of the filled box with a stripper device having individual weight units resting on the upper surface of the several sections of the block;

Figure 5 is a transverse, vertical section ofthe entire device of, Fig. 4, in the plane indicated by the line 5-5 of that view, and with the mold box, blades and cores shown in raised position in dotted lines, and

Figure 6 is a view of a locking pin.'

In the several "views o'f my structure, the mold and blocks are shown resting on an imperforate pallet a1. The mold box has elongated side walls or plates c and intermediate toward the pallet just equal to. the height of the finished block. These stripsiare rovided with protuberances 31 by which the strips are suspended from the walls c, as will be later explained. I 'provide a cut-out notch on the inner surface .of the walls c i and near their upper edge, thus' providing the supporting pallet a. The thickness ofl these plates 14 and 15 together with the height of the wall plates b and c, are such that the upper surface ofthe plates 14 and 15 is level with the upper surface of'the finished block, and also level with the upper end' of the cores, later to be described, when theI cores restupon the pallet.

The plates 15 extend at their ends 16 far beyond the siode walls c,and their side edges 17 extend over and beyond the edges of the end plates '6. The outer side edges of the plates 14 arel just in alinement with the ends of the plates 15, the result Abeing a rectangular u per surface of the entire mold. The end wall plat-es b are secured by bolts d to the plates 15, and plates 14 and l5 are secured to the bars c by bolts or screws 18, so that lifting bars o by their ends 12, will lift the plates 14 and 15 and thereby the wall plates b. Lifting the extensions 12 of the bars c will therefore, raise the box wallsX and their cover plates.

It'y is one of the purposes of my invention to provide suitable means for suspending the coresboth the inner cores 10 and the yend halfcores 19, from thei upper part of the box Walls. I do this by providing a cutout notch near the upper end of the wall plates b on their inner surface thus providing a `shoulder 32, as seen in Fig. 2. The parts 19 have also a notch to receive therein the inner edges of the plates 15, and cores 19 have protubeiances 21 fitting above 32, so that lifting wall plates b will lraise the cores 19 with them. The suspension of the cores 10 is pro'vided. ,for by other means.`

The intermediate' cores 1() are carried by suspension from cross bars 11 shown-in Figs. 1 to 5. These supporting bars are mounted vertically transverse of thel mold box'and resting upon -side members c and 22. The

bars 11 have smooth upper edges for guiding certain stripper heads to be used therewith and therefore project above the mold, but lower ed es provided with spaced rectangular note es 33 fora purpose to be later explained. One of the ends of each bar extends for a considerable length beyond the nearest notch 33 and has an oblique low- The cores 10,`of which there aie as many as there are to be hollow openings in the complete block 40, have open bottoms and closed upper ends 36, except that a transverse *slot 37 is provided centrally across the greaterydimension of the core of the width of the -support 11 to receive the latter in said slot when it is locked therein by the cross pin 13, as before explained. A further exception to the end 36 being wholly imperforate, lies in the arrangement of asmall per;

foration 38 in the upper end of the core to permit entrance of air thereinto or there-- from. A plurality'of such perforations 38 may be provided if it is desired. In Figs. 3 and 5 it is clearly shown that the outer surface of the plates c` adjacent their upper end is slotted at 39 to guide the supports 11 1n position on the walls c and insure their proper spacing therein. The notches 33 are therefore, of the exact width to receive therein the upper ends of c and 22, as well as the thickness of the upper edge of the block wall, so that the edge 41 of the notches 33 -is in exact alinement with the outer surface 42 of the core 10. The support bars 11 will there-l Ifore,accurately mount the cores 10 in exact gelative position, but will also, by the plates 14 andv their slots 35, be positioned properly relative to each other.

It is to be especially noted that the lower l edges 23 ofthe parts b and c are normally raised somewhat above the pallet, since the parts 22 as Well as the several cores 10 and 19 rest upon-the pallet, and the cores and parts 22hold the mold as aunit in raised position as shown in Figs.v2 and3. As a special construction of great novelty and value, I have provided the lower edges ofthe end wall plates b with at least one cylindrical open' ing 24 for receiving therein a movable plunger 25. Abovethe opening 24 an operiing of reduced size 26 communicates with the opening 24, and a coiled, compression spring 27 is-mounted in 26 and exerts aA iso sirable lateral movement of the mold unit upon the pallet, which without such special construction is apt to result from the vertical vibration of the mold and cores upon the pallet when the molded material, is -Ybeing ltamped in the mold. The continuous downward pressure of these plungers 25, of which there may be one in each end plate Z), but of a yielding nature, overcomes such lateral ovement.. vUsed in combination with they the mold box and .cores and the guiding supports `11 for the cores, I have provided a useful element for assisting the removal of the ment is especially intended for hollow blocks, and therefore is essential for removing mold and cores from such blocks withoutinjury to the product. It is well known that a solid moldedproduet may be readily heldy block from the mold and cores consisting of a stripper' member which includes a supportsing plate 43 having a length greater than the distance between the ends ofthe moldincluding the Iend half-cores 19. From this plate is suspended therefrom and attached thereto in spaced relation from each other, a plurality of stripper heads 44 whose transverse cont-our is substantially that of the sections of the finished block, the sections referring to the portions of the block divided by the intermediate cores. My stripper elein stationary position whilethe mold walls are removed from the product. It may be evenconsidered a simple matter tolapply a weight of primitive form to a brick, for example, and then loosen the mold walls fromaround the brick. It is appreciated, however, that quite adi'erent problem arises when the diliiculty -of removingr the outer 4walls, as well-as a plurality of cores spaced apart, from the block having the plurality of cavities therein occupied by the cores while' molding, isv encountered'. The mold box here illustrated and which is 'the result of my invention is shown l as Acomprising a mold for molding a' bleek having threev spaced intermediatecavities 45 and end depressions 46 which are used in positioning. ends of such blocks in registration, so that the end depressions will result in substantially the same form ofcavity. A corresponding convex half-core 19 is therefore required for the purpose, and this construcltion further complicates the operation of removing the mold-and cores from the finished block.

i Since the,il1ustrated block is to have three finner. cavities, three. intermediate cores 10 will be needed, two end cores 19, and thisv,1-ill. resu lt` in four sections of the block which will,` be practically du licates. For

' 'this' reason,-' an equal vnum er---four-of Spese.

'stripper heads' 44 are provided for the vpur- The'se heads 44 are arranged in aline- 'ment by being'spaced apart the exact thick- .ness of thefcoresupports 11, whereby theuseveral core members.

eral heads, of 4contour like that .of the block sections, and when the heads are guided by the support ,bars 11 between them, will rest` in exact registration u on the Jseveral sec.- ti'ons of the block. he several su port bars 11 will hold the heads 44 in exact aterv al position each on its particularsection, andl f1 the position. of the entire stripper element may be determined by the relative position thereof between theupperl endsr of the vertical members 22, thus ositioning the stripper exactly, on the bloc rreat crossbars `11 as guiding elements is of ihneimportance, aside from their support tion.

The height of the heads 44 will be some-- what greater than the distance between the top of the pallet or other support and the upper edge of the bars 11.v \Vhen this is done, thel mold box can obviously be raised" to a height that willfully clear the molded block remaining yon the pallet, without causing the bars 11 to contact the under` side of the bar orplate 43. The plate 43 with its heads 44 will therefore, remain upon `the block sections to retain them 'in stationaryposition upon the pallet, whileby lifting the extensions-12, and thereby the walls c,

the entire'mold together with the cores 10 Y and 19 will'be lifted from the block and its "palletgand the danger or risk of injury to the product by the operationvwill be almost negligible.

After so removing the mold and`cores, the

n and about'thesev- This function of. 'the i stripper may be readily removed as it will be no longer needed for that unit, and the *mold ,and cores maywell be positioned on another pallet, while the-molded block and its pallet may berdepositedwherever convenient.v It is my purpose to provide the aperture each time the block i is molded. This avoids deleterious resultsfrom the possible creation of a vacuum in the'cores when the apertures are filled by accidental deposit -of material on the cores.

The arrangement of the .imperforate pallet a' as a -support for the mold box, including `thecores, andproviding the pallet of a size 4the block: This provides for opening such*` `i extending beyond the lower edges of the.'

mold plates,it is evident that the same pallets may be for molding blocks of different size wlthout chasinge. The 'larger pallets may be utilized for molding blocks of' any form" or size that are withinthe outline of the pallets," The size and number of Acores to be be variedLas will be at once understood urther,

used withT these pallets may readilg` fio will then prevent endwise movement of thev the cores may be of relative, larger interior cross section than would be possible Without the use of the stripper mechanism herein specified, and the resulting thickness of block wall about the different cores may be thereby reduced because of the satisfactory and positive operation of the stripper mech-- anism disclosed. This "is because the substantially entire upper surface of the block,

despite its very irregular and curved outline, is covered by the stripper sections 44 which hold the entire block stationary upon the pallet while the mold and cores' are being raised from the pallet. All of this perfected arrangement of parts which are well adapted to work together, results in a\ very delicate and uninjured product which without this moldI box and attachments has been quite impossible of attainment hitherto.`

Operation As above -disclosed and de-4 scribed, the'mold box is assembled with the members 22 attached toy theside walls c by the connected parts'20 and 31, and the Vplates `ltresting upon the top of the Walls c. The .end walls b attached to the plates 15 are then vplaced at the ends of the mold, and

the end cores 19 attached by positioning the shoulders-beneath the inner edges of 15, as

shown in Fig. 2.' The` inner cores 10 are then positioned within'the walls of the mold, the lsupports 11 being secured to the cores by lseating the members 11 in the slots 37 of the cores. The' notches 33 of the supports 11 supports 11, and the slots 37 will avoid lateral movement of the supports-and the cores 10 carried by them. The supports are very4 fected, it is my purpose to lift the mold and cores oit/the block while the latter remains stationary on the pallet.- To do this, I now lift the bar or plate 43- having one more head 44 than there are inner cores 10, secured thereto and spaced apart just suliicient lto permit thesupports 11 to be inserted between the said heads 44( By this arrange, '1nent, 1t is 'evident the 'stripper element including'theheads, as well as the bar, may be -readily lifted manually intoposition over the filled mold. The

heads are accurately positioned upon the several sections of molded I material' by the guiding. function of the up I extending edges'of the supports 11. W'lin about the upper opening ofthe mold.A

once the heads are in position, the entire mold andcores therein may be lifted upward toward the plate 43 by lifting upon the ends of the extensions 12, as before explained. When the mol and-.attached parts are raised/sufficiently, he pallet and the finished block thereon maybe readily removed and the moldplacednganother pallet rea y for another and siinilaryoperation.

Having l.thus described myv invention, what I claimandpdesire to secure by Letters Patent, is--f 1. A mold carried within said mold, and means, includin'g spaced parallel upper guiding edges for positioning stripping devices upon the finished block, resting upon the upper edges yof certain of said walls for cores therefrom.`

2. A mold having an open bottom and side and end Walls, cross bars having upper parallel and spaced guiding edges extending above the mold walls, resting upon the upper edges of certainv of said walls, and means for suspending fromsaidbars; cores within said mold. l v

3. A" mold 'having side and end wall having side and end walls, cores suspending said plates, the side plates/extending past the ends of the end plates and having the 'same height from the pallet upon which the mold normally rests, and inner side plates of greater height th'n the first-mentioned plates. and mounte 4. A mold compri ing outer side and end plates of equal heig t, deeper inner plates detachably secured to* the shallower side plates, and end half-cores detachably se` cured to the end plates l 5. A mold. comprising main side and end plates of equal height, and deeper yside plates detahably secured on the inner surfaceof the main side plates and extending bot-h above and below the corresponding edges ofV l the main side plates.

6. A mold comprising wall plates some of which are deeper than others, a support separately upon the shallower side plate,l

for said mold, and the shallo-wer plates having means in their lower edges for exerting a. yielding pressure downward upon the surface of the support.

47. A mold comprising Wall plates some of which are deeper than others, a pallet of greater area. than the mold for supporting the same, and the shallowerplates having a spring-pressed plungery seated in an open' ing therein, and exerting a v'force downward upon the surface of said pallet.

8. Al mold comprisin'gside andendwalls,

an open bottom and top, verticalplates attached to' certain of said walls, and side and end plates arranged in a single plane at right angles to the 'vertical plates and resting upon the upper edges of said walls, and

vertical plates and about the lupper opening of the mold, and resting upon the upper edgesof thefsaid walls, but having an upper surface common with the upper edges of said vertical plates.

10. A mold having side and end Walls and an open bottom, cross bars resting upon or above the edges of certain of said Walls, the latter having spaced slots for receiving said bars therein, and cores suspended from said bars.

11. A mold having vertical side and end Walls and an open bottom and top, side and end plates arranged at right angles to the vertical plates and aboutthe upper opening of the mold, cross bars resting upon the edges of certain of said walls, the latter having therein spaced slots for receiving said bars, and means for attaching cores to said' bars so that the cores will be suspended Within the mold.C

12. A mold. having an open bottom and side and end Walls, cores for positioning Within said mold, cross bars rest-ing upon the edges of certain of said walls and having in its lower edges notches for receiving therein the upper eir'ds of certain of said Walls, and said cores having in its upper ends cross slots for receiving therein the bar edges between said notches. l

13. A mold having an open bottom and sideand end Walls, cores for positioning within said mold, cross bars resting upon the edges ofcertain of said walls, said cores having in its upper ends cross slots into 'which the bars closely fit, and means `for attachment of the cores and bars.

14. A mold having an open bottom, and

vside and end Walls, cores for positioning Within said mold, cross'bai's resting upon the edges of cert-ain of said walls and having in their lower edges notches for receiving therein the upper ends of certain of said Walls, and the said cores carried by said bars. f

15. In combination, a mold box having open top and bottom and side and end walls, a support for recei-Vingthe mold box thereon, spaced core members suspended from the top edges of certain of the mold Walls, and a stripper element comprising spaced stripper heads each having thetransverse outline of a block section molded about a core and an elongated bar' having said .heads attached to one surface ofthe bar in properv relation to rest upon the several block sec- 'tions tov retain the same upon the support while the rnold box may be lifted therefrom.

16. In combination,I a mold box having vopen top and bottom and side and end walls,

Ja support for receiving the mold box thereon, spaced core members suspended Within the mold, spaced cross bars resting upon or above the edges of certain of said walls and having means for attaching thereto the 'said cores, andl a. stripper element compris'- ing spac'ed heads each having the usual outline of a block section molded about a core, and an elongated bar having the said heads attached to one surface of the bar in proper relation-to rest upon the several block sections to retain the same upon the support While the mold box may be lifted therefrom, the several stripper heads being laterally separated from each other sufficiently to receive the said cross bars therebetween.y

17'. The structure of claim 16' in which certain of the Wall plates are provided with spaced slots for receiving t-lie said cross supports therein to guide the supports, sothat the latter mayguide the stripper heads into osition upon the block sections.

18. he structure 4of claim 16 in which certain of the Wall plates are provided with spaced slots for receiving the said supports therein to guide the cross supports, and the height of the stripper heads is greater than the distance from the base support to the' ture therein, and said elongated stripper L bar 1s provided with a lpin for entering said apertures vvhen the mold and cores are raised. v

20. A mold having side and end walls, vertical plates attached to certain of said Walls and projecting above said walls, and alcore carried upon the upper edgesl of said p ates. f

21. A mold having vside and end walls and an open bottom, vertical cross bars 'extending above tlie top of the mold and resting upon or above the upper edges of certain of said walls, and cores .suspended fromsaid bars.

22. A mold having side and end walls and an open bottom, spaced' vertical cross bars extending above the top 4of the mold, and their ends beyond the said Walls, and cores positioned Within said mold and suspe from said bars. v

23. A mold comprising outer side and -end nded los

Walls of equal heightdeeper side plates de- Y ltachably secured to the inner surface of the shallower side walls, and end half-cores dey tending both above and below the edges f thereof, intermediate cores of equal length with said end cores, and means resting upon ,or above the upper edgesof certain of said Walls, from which said .intermediate cores are suspended.

25. A -`mold comprising side and end walls, spaced cores-.Within said mold and secured to the inner surface of certain of said walls but extending upwardly beyond the upper edge of said Walls, and plates arranged in a single plane at right angles to the mold Walls, said plates resting upon the upper edges of said cores with their upper surfaces in the same plane with the upper edges of the cores and of the upper surfaces of the nished block.

26. The combination of a moldA box having open top and bottom and side and end walls, a support for receiving the mold box thereon, spaced hollow core members suspended Within the mold; a stripper head comprising spaced members each having the usual outline of a block section molded about a core, and an elongated bar having the said stripper members attached to one surface of the bar in relative position to rest upon'the several vsections to hold. the latter u on the support while the mold boX is 1i ted up therefrom, and means for permitting entrance of air into the cores when the mold and cores are raised.

27. 4The combination of a mold box having open top and bottom and side and end Walls, spaced hollow core members suspended Within the mold, a stripper element comprising spaced heads each having the usual outline of a block section molded about a core, means for holding the said spaced heads in 'relative position-to rest upon the several block sections to hold the latterl my hand and seal this 30th day of July,l

` JESSE H. BESSER. 

